True Wind Calculations

Next to instruments for the Aparant Wind, the Dashboard plugin has instruments to show the True Wind Angle (TWA), True Wind Speed (TWS) and True Wind Direction (TWD). If there are no NMEA-strings available for this data, the values for TWA, TWS ad TWD can be calculated. However, this is not done (yet) in Dashboard. The Tactics-Plugin and Dashboard-Tactics plugin both do calculate values for TWA, TWS and TWD for certain cases. Documentation for calculation True Wind in the Tactics-Plugin can be found here.

PS: See the [https://opencpn.org/wiki/dokuwiki/doku.php?id=opencpn:opencpn_user_manual:plugins:sailing:tactics#tactics_faq|Good Diagram]], along with some links to discussions. Note the difference between “True Wind” and “Ground Wind” and the hybrid in-between which uses SOG, and the associated comment in the graphic.